WHAT IS THE FACTS ABOUT CHEMICAL REACTIONS What are chemical reactions?
What is a chemical reaction? A chemical reaction is a process where one or more substances are converted into one or more different substances. Chemical reactions occur when atoms are rearranged, forming new chemical bonds and breaking old ones. The substances that undergo chemical reactions are called reactants, and the products and the reactants and products are typically in different physical states (e.g., solid, liquid, or gas).